Specifying branching priority in JuMP/CPLEX

Specifying branching priority in JuMP/CPLEX

Hello,

As of release 0.14 of JuMP, it is still not possible to specify a branching priority for a MIP. I am trying to solve this single-source capacitated facility location problem by B&C using JuMP/CPLEX. In this problem, the location decisions usually have a much larger impact on the bound than the assignment decisions, so branching on those variables first is only natural. In <a href="https://groups.google.com/forum/#!searchin/julia-opt/branching|sort:relevance/julia-opt/XRsNJiZ6_CU/WOdl9hMlCQAJ">this topic someone suggests to use the functions provided in the CPLEX module directly, however I do not know what is the right way to do so. A sketch of my code is something like:

Re: Specifying branching priority in JuMP/CPLEX

This is still a CPLEX-specific feature (as mentioned in the other thread). You’ll need to work with the CPLEX-level model object (internalmodel(model).solver) and the “linear indices” of the variables (accessible as, e.g. linearindex(y[1])).

As of release 0.14 of JuMP, it is still not possible to specify a branching priority for a MIP. I am trying to solve this single-source capacitated facility location problem by B&C using JuMP/CPLEX. In this problem, the location decisions usually have a much larger impact on the bound than the assignment decisions, so branching on those variables first is only natural. In this topic someone suggests to use the functions provided in the CPLEX module directly, however I do not know what is the right way to do so. A sketch of my code is something like:

Re: Specifying branching priority in JuMP/CPLEX

This is still a CPLEX-specific feature (as mentioned in the other thread). You’ll need to work with the CPLEX-level model object (internalmodel(model).solver) and the “linear indices” of the variables (accessible as, e.g. linearindex(y[1])).

As of release 0.14 of JuMP, it is still not possible to specify a branching priority for a MIP. I am trying to solve this single-source capacitated facility location problem by B&C using JuMP/CPLEX. In this problem, the location decisions usually have a much larger impact on the bound than the assignment decisions, so branching on those variables first is only natural. In <a href="https://groups.google.com/forum/#!searchin/julia-opt/branching%7Csort:relevance/julia-opt/XRsNJiZ6_CU/WOdl9hMlCQAJ" target="_blank" rel="nofollow" onmousedown="this.href=&#39;https://groups.google.com/forum/#!searchin/julia-opt/branching%7Csort:relevance/julia-opt/XRsNJiZ6_CU/WOdl9hMlCQAJ&#39;;return true;" onclick="this.href=&#39;https://groups.google.com/forum/#!searchin/julia-opt/branching%7Csort:relevance/julia-opt/XRsNJiZ6_CU/WOdl9hMlCQAJ&#39;;return true;">this topic someone suggests to use the functions provided in the CPLEX module directly, however I do not know what is the right way to do so. A sketch of my code is something like:

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